A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Correct Answer: A
Solution :
If roads of the mountain were to go straight up, the slope q would have been large, the frictional force \[\mu mg\cos \theta \] would be small. Due to small friction, wheels of vehicle would slip. Also for going up a large slope, a greater power shall be required.
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